Boring head



July 31, 1923. 1,463,686

.J. H. FREY'ET AL.

BORING HEAD Filed Aug. 29. 1921 2 Sheets-Sheet l July 31, 1923. v 1,463,686

y J. H. FREY ET Al.

lBORING HEAD Filed Aug. 29 1921 2 Sheets-Sheet 2 Patented July 3l, 1592?.L

UNiTEn sTATas JOHN H. FREYAND JOHN N. KAISER, or umn, PENNSYLVANIA.

BORING HEAD.

Application med Au'gust a9, 11921. serii iraq-196,776.

Y To all whom t may concern.'

Be it known that we, JOHN H. FRnY and Y JOHN N. KAISER, citizens of the United States',

residing at Erie, inthe county of Erie and State of Pennsylvania, have' invented new and useful Improvements in Boring Heads, of which the following is a specification.

This invention relates to adjustable boring tool holders, wherein the component parts are held fixed relatively in a' given position through- Ythe instrumentality of a lock nut, which when loosened allows the tool holder to be accurately'and minutely adjusted with ay View of centering or decentering the tool without the use of keys, wrenches or other analogous implements.

' The nature and .advantages of the invention will bebet'terunderstood lwhen the following detailed description is read inconnection with the accompanying `drawings,'the invention residing in the construction, comand arrangement of Vparts as' bination, claimed. i

Y In the drawings forming part of this application, like numerals of reference indicate similar parts in the Several views and wherein :--v Y Y -V Figure l is a View in'elevation ofthe' tool holderrconstructedv in accordance with the present invention.

Figure 2 is a vertical sectional'view therethrough. i i Y.

Figure 3 is a similar view, showing the tool holder by dotted lines in one of its ad. justed positions. y f

l Figure 4 is a top-plan view of Figure 8.

' Figure 7 is a topy planlview ofthe adjustable ring.

^ 'Figure 8 is a transverse sectional View taken on line 8 8 of Figuref. 'i Figure 9 is atop: plan view of the groovec plate. j l 1 *i Figure 10 is a sectional view taken on line 10-10 of Figure 9.

Figure l1 is a plan view of the tool holder.`

The device forming the subject matter of the`present invention comprises a tubular casing 10 which is open at one end, and which receives the component parts of the device as illustrated. Arranged within the casing 10 is a clamping ring 11 formed with an inwardly directed flange 12, which flange reposes upon the shoulder 13 of the adjust- Figure 5 is adetail view of the lclamping ing ring ldrclearly illustrated in lFigures 7 and 8.f This adjusting ring is provided with an oblong 'slot or opening 15 which receives the tubularA portion 1 6A of the tool holder clearly shown in Figure 6. The tool holder is provided with a head 17 anda squared reduced portion 18, the latter being slidably t fitted in the 4squared recess 19 formed on the underside of the adjusting ring Maud extending across-the entire face thereof. The head 17 of the tool holder engages the 'bottom face of the adjusting ring 14 as clearly illustrated in Figures 2 and The tubular porgrooves 22, and has openings arranged'at intervals beyond the grooves'for a purpose to be hereinafter referred to. vThis plate is provided with a depending threaded boss'Q as clearlyl illustrated in Figure 10 and threaded on' this boss is a lock nut 241.V The lock nut is provided with a threadedcentral openingl for `this purpose,` and also formed with anannular flange 25' which embraces the adjacent endl of the cylindrical casing 10. I nterposed between the lock nutQl and the adjacent side orfac'e ofthe plate 21fis a washer, the latter including inner and outer concentri'callyk disposed sections 26 andj27 respectively.'A These sections areV formedv with overlappedl flanges V28. The clamping ring is provided withthreaded bores 29 to ,l i

receive the threaded screws or othersuitable fastening -elements-BO-which project fromthe outer section ofthe washer and through rings 30' which are mounted in openings inthe plate 21. Thesefastening elements 30" hold the parts operatively assoi ciated,'whilethe lock nut holds the parts fixedfrelatively ina set jposition, 'it being apparent that kwhe'n'the lock nutis 'tightened thefigrooved Vsidefof the 'plate' 21V islimpinged against the-head of the tool holder.

Closing the upper end of the casing 10 is'an annulus 31 ofU-shaped formation in .across section, the depending portion of y"which is graduatedas at 32 so that the degree of adjustment of the tool holder may I be readily determined. This depending por- 35 is ycarredk-by the-tool holder projecting from the `head 17 thereof `and held fpositioned ,within thev grooves 22 ,of theplate 21. 'll-his spring pressed dogis adapted, upon rotation of the .adjusting ring and the tool holder therewith, yto be moved around the spiralgroove .inthe plate 21 `thus regulating the .sliding .movement of the tool Vholder in .the slot 15. `This construction` providesa guidingV means for the movement of the j tool holder which is always in position, not

manner.

liable' .to encounter .any great Y resistance which ,would render the device hard of mpvement, .and vwhich .renders vthe desired adjustmentV in an accurate and c fiicient i In .practicalthe ltool .holder 1Gl can be quickly and conveniently adjusted to center or decenter the tool `withrelation-to the ver-V tical axis ofthe y'device in its entirety, Without the use of keys, Ywrenches or other analH ogous tools. To accomplish this, it 'isonly Vnecessary to loosen the .lock nut 24;. which allows Ythe adjusting ring 111 to` be rotated within the clamping ring 11, and rotary movement is .imparted t0 .the ring 14C lthrouprgh the instrumentality of the Iannulus 31. As above stated, this annulus is. graduated so that the .degree oi:l adjustment may be reachv ily determined. reason-of the fact that the adjusting ring is formed with a squared recess 19 to receive the squared portion 18 of the :tool holder, the latter is; rotated simultaneously with thelrotation .of the adf justingA ring 14;. Consequently, the spring pressed .dog carried by .the tool holderY isY moved within the grooves 422 of theplate 21, thus vcausing the tool holder to be shifted through the elongated. slot 15 of the ring 14,' the desired distance to either side ofthe een# ter of the ring,'depending upon the direction Ywith a view 'of either centeri ff or decenter-` i il@ in Whichthe annulus 31 is turned. Subsc.

quentV to this adjustment of the tool holder,

ngthe latter the 109k nut 9A iS tightened to hold the parts fixed relatively in a set PQ- SrlOIl; andV preventing any moi/ement ofV the tively in .a set position.

pants when the tool is under-a .heavy cut or strain. y The lock nut if desired may be equipped with a locking screw 36 which associates the lock nut with the inner section- Aof the washer above described.A

Ylhile it is believed that from the foregoing description the nature and advantages .of the inventionl will kbe readily apparent,

:we desire to haveit understood that we do not limit ourselves to Ywhat is'hereingshown and described, and thatjsuch changes may be resorted to whe-nvdesired as fall'within the scope of what is claimed.

What we claim yi's:-- Y Y 1. An adjustable 'toolv holder comprising a cylindricalcasing, a ring arranged'w'ithi-n said casing for rotation andh'avinglan elon-V Y gated slot, Ya tool vholder.passedthroughfsaid slot, means for associating the-tool holder with the ring for rotation therewith,`a plate arranged within the casing and. having a spiral groove, a .sp-ring pressed dogcar-ried by the tool holderand movable withinsaid groove, whereby said Y,toolholder is Vmoved within said slot and acrossfthe vring neither direction incident to thev rotation of the ring, and means for locking said parts fixed rela `2.111 a boring he-ad'and adjustable` tool holder. comprising in combination, ya tuvbular casing, a clamping ring provided with an inwardly extending .flange arrrm'gedY within said 'casing, an vadjusting ringV rotat- 4ably mounted. Within said .casing provided if:

with .a redlld shoulder receiving said iange and having an elongated slot, ia tool holder :mounted thru `said slot, a head ion 'said .tool holder, a reduced portion Von said head mounted in the slot .or lthe adjusting ring. for rotation .therewith and having sliding movement therein, a spring pressed,v

dog mounted in the head :of the tool holder,

a plate provided with athreadedshank and having a spirally grooved face engagedby the end of said ,dog, an annulus mounted on top oit. thefcasingrand connected with thev adjusting ring adapted to. regulate transverse movement of v the tool holder by rotation oi? they-spring pressed dog in-'the spiral groove of said plate, and a lock KnutV mountedon. said threaded shank andengaging the outer face 0f the casing and, thel bottom ofgsaidV plate holding. the partsin setposition. i Vj Ipntestimony hereof` we aliix our .signatures. c Y .Y

.roer FREYL l JOHN N., lKeisha 

